2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sbin/hammer/cmd_snapshot.c,v 1.1 2008/06/25 13:10:06 mneumann Exp $
38 #include <sys/param.h>
39 #include <sys/mount.h>
42 static void snapshot_usage(int exit_code);
45 * snapshot <softlink-dir> [<filesystem>]
48 hammer_cmd_snapshot(char **av, int ac)
51 const char *filesystem;
53 struct hammer_ioc_synctid synctid;
58 if (ac == 0 || ac > 2)
65 else if (statfs(softlink_dir, &buf) == 0)
66 filesystem = buf.f_mntonname;
68 err(2, "Unable to determine filesystem of %s", softlink_dir);
70 bzero(&synctid, sizeof(synctid));
71 synctid.op = HAMMER_SYNCTID_SYNC2;
73 fd = open(filesystem, O_RDONLY);
75 err(2, "Unable to open %s", filesystem);
76 if (ioctl(fd, HAMMERIOC_SYNCTID, &synctid) < 0) {
77 err(2, "Synctid %s failed", filesystem);
79 asprintf(&from, "%s@@0x%016llx", filesystem, synctid.tid);
82 err(2, "Couldn't generate string");
84 if (softlink_dir[strlen(softlink_dir)-1] == '/')
85 asprintf(&to, "%s0x%016llx", softlink_dir, synctid.tid);
87 asprintf(&to, "%s/0x%016llx", softlink_dir, synctid.tid);
90 err(2, "Couldn't generate string");
92 if (symlink(from, to) != 0)
93 err(2, "Unable to symlink %s to %s", from, to);
102 snapshot_usage(int exit_code)
104 fprintf(stderr, "hammer snapshot <softlink-dir> [<filesystem>]\n");